Spiked roller for agricultural purposes.



R. NAGKE.

SPIKBD ROLLER FOR AGRICULTURAL PURPOSES.

uruouron mun nx.24,19o9.

I 943,989. Patented Dec.21,1909.

ROBERT NACKE, 0F LANGENHOF, NEAR BICLEFELD, GERMANY.

SPIKED ROLLER FOR AGRICULTURAL PURPOSES.

Specification of Letters Patent.

Patented Dec. 21, 1909.

' Application filed March 24, 1909. Serial No. 485,404.

To all whom it may concern:

Be it known that I, ROBERT NACKE, citizen of Gern'iany, residing atLangenhof, near Biclefeld, Germany, have invented new and usefulImprovements in Spiked Rollers for Agricultural Purposes, of which thefollowing is a specification.

This invention relates to a spiked roller for agricultural purposeswhich can be adapted to the most varied conditions of working. For thispurpose the mechanism is so arranged that the spikes which areinterchangeable in the well known manner, can be replaced by bolts witha flat head for the purpose of converting the spiked roller into asmooth roller. The spikes can therefore also be set more or less closelytogether according to requirements, or they can be altered one withregard to another and be exchanged for other spikes of difi'erentshapes. If the spikes be replaced by special plugs which close theopenings provided for the spikes, the roller is converted into a smoothroller without the necessity of changing the: roller itself.

In the drawing the invention is illustrated as follows:

Figure 1 shows a perspective View of a single ring of a roller. Fig. :2shows the method of fastening of the interchangeable spikes, and Fig. 3shows that of the plugs provided for filling the spike holes.

The separate roller rings (I which are placed upon a shaft one besideanother and in any desired number. are provided with numerous spikes 0.Each spike e is provided with a flange, and this flange is continuedbelow in the form of a cone which terminates in a screw bolt. By meansof the cone the spike is fitted into a correspondingly tapering boringof the roller surface and is firmly secured upon the inside of the sameby means of a nut f which is pressed against a corresponding projectioni of the roller envelop.

The securing of the spikes can obviously be effected in other ways. Forinstance upon the underside of the flange, which in this case ispreferably made somewhat Wider, two pins may be fixed which engage incorresponding perforations of the roller ring;

or the attachment might be effected by simply screwing in the spikesrovided with screw bolts into a correspon ing cavity in the roller ringsuitably threaded.

The interchangeability of the spikes is of quite special importance fordouble rollers, because in these cases it is desirable to have thespikes upon the front roller less numerous than those upon the rearroller and to set them so as to alternate with one another, for thepurpose of avoiding the passing of the spikes of the rear roller intothe holes formed by the spikes of the front roller, while the parts ofthe field which come between the said holes remain untouched. Thisdrawback of the rollers now in use can only be obviated by means of easyadjustability of the spikes.

For the converting of the spiked roller into a smooth roller. the boltholes for the spikes are tilled with suitably fitted pieces. As shown inFig. 3, this can be done by means of little screw bolts with coneshapedheads said bolts being also attached by means of nuts f. In the use ofthe spikes above described having two securing pins, the filling of theholes is effected by means of a suitably shaped plate also provided withtwo pins.

I claim:

A roller having holes therein, interior annular projections surroundingsaid holes, said holes flaring outwardly, spikes having a taperedportion adapted to engage with the flaring portion of the hole, and ascrew threaded end, a nut adapted to engage with said screw threaded endand resting against the interior projection to removably hold the spikein position. and fiat headed bolts located in some of the openings. saidbolts having tapered heads engaging with the flaring portions of theopenings and a screw threaded end, and a nut engaging with said end andresting upon the interior projection.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ROBERT NACKE.

\Vitnesses:

LUIsE KATHER, R. G. THOMPSON.

